example of `ScalaTest` with `Airframe`

DateTimeSupport.scala

package dev.zerosum.sandbox.base

import java.time._

import wvlet.airframe._

trait DateTimeSupport {

  private lazy val clock = bind[Clock]

  def now: OffsetDateTime = OffsetDateTime.now(clock)
}

DateTimeSupportSpec.scala

package dev.zerosum.sandbox.base

import java.time._

import org.scalatest.funspec.AnyFunSpec
import org.scalatest.matchers.should
import wvlet.airframe._

class DateTimeSupportSpec extends AnyFunSpec with should.Matchers {

  private val design: Design =
    newSilentDesign
      .bind[Clock].toInstance(Clock.fixed(Instant.EPOCH, ZoneOffset.UTC))

  private def tested[Actual](f: DateTimeSupport => Actual): Actual = {
    design.build[DateTimeSupport](f).asInstanceOf[Actual]
  }

  describe("now") {
    it("is the time!") {
      val actual   = tested(_.now)
      val expected = OffsetDateTime.of(1970, 1, 1, 0, 0, 0, 0, ZoneOffset.UTC)

      actual should be(expected)
    }
  }
}

package.scala

package dev.zerosum.sandbox

import java.time._

import wvlet.airframe._

package object base {

  private[base] lazy val defaultOffset = ZoneOffset.UTC
  private[base] lazy val defaultClock  = Clock.system(defaultOffset)

  val design: Design = newDesign
    .bind[Clock].toInstance(defaultClock)
}

tested[Actual] の定義のところ、macroとか使いこなせればspec毎に書かなくても良くなるか?